Hi Svein,
If there's a code I don't think anyone has cracked it yet. Certain models can be approximately dated by patents or patented features or from subtle changes maybe illustrated in dated catalogues. Sometimes it's not the stove that holds the key - sometimes I find Radius stoves with instruction sheets which are accurately date stamped with day, month & year by the packer with a motto along the lines of Packed in good condition by: H 23 Jan 1929. If to satisfaction recommend radius to your friends - if not tell us.
Cheers,
Ross |